Im looking for flux to use when soldering circuit boards will this work?

If you are looking for flux to use for soldering circuit boards, you need to consider looking elsewhere. Will it "work", sure, but it may damage the board you're working on. This kind of flux is acid based, it's meant for pipe fitting, not for electronics. The same goes for stained glass, the acids won't damage it. It says so in its description "ideal for use with 95/5 and other common solders." In electronics soldering, leaded solder is preferred. It flows a lot easier, and a long as you don't eat it you won't be poisoned.

Is this an acid flux? thank you.

I Believe do. I got it to solder a glass piece but haven’t used it yet

Will this work with harris sta-brite solder (96% tin/4% silver, melts at 430 f)?

I use this with a Wen 250 watt soldering gun , and it works Great with Light gage solder [ I use it for rewiring chores all the Time ]

Rectorseal Corp Paste Flux 4 Oz

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

🛠️ Flux like a pro—clean, smooth, and built to last!

WATERPROOF DURABLE - Ensures long-lasting, corrosion-resistant solder joints
TRADE TRUSTED QUALITY - Preferred by HVAC, plumbing, electrical pros for reliable results
CLEAN SAFE SOLDERING - Lead and acid free formula protects your work and health
EFFORTLESS APPLICATION - Smooth paste consistency ensures precise, mess-free use every time
VERSATILE METAL COMPATIBILITY - Works seamlessly on copper, tin, zinc, nickel, and sheet lead

Rectorseal Corp Paste Flux 4 Oz is a professional-grade, lead and acid free soldering paste designed for easy application and reliable performance. Ideal for use with 95/5 and common solders, it works on multiple metals including copper and tin, offering waterproof, durable joints trusted by tradesmen in HVAC, plumbing, and electrical fields.

Specifications

ASIN	B0013B1XJW
Best Sellers Rank	552,145 in DIY & Tools ( See Top 100 in DIY & Tools ) 86 in Solder Fluxes
Brand	Rectorseal
Colour	Clear
Compatible Material	Ceramic, Glass, Metal, Plastic, Wood
Container Type	Tube
Customer Reviews	4.6 out of 5 stars 387 Reviews
Full Cure Time	24 Hours
Global Trade Identification Number	00052541140103
Item Form	Paste
Item Package Quantity	1
Item Volume	4 Fluid Ounces
Item Weight	4 Ounces
Item form	Paste
Manufacturer	The Rectorseal Corporation
Manufacturer Part Number	14010
Material	Resin
Model Number	14010
Number of Pieces	1
Other Special Features of the Product	Waterproof
Special feature	Waterproof
Specific Uses For Product	Electronics Repair, Construction
Specific uses for product	Electronics Repair, Construction
UPC	052541140103
Unit Count	113.3981 gram
Viscosity Level	Low to Medium
Water Resistance Level	Waterproof

Reviews

G**Y

Proper flux

Good flux.Tins up nicely.

25.06.2016

L**O

Buen producto

Buen producto ,precio elevado

4.08.2022

E**.

A Must Have For Soldering Jobs

Used it to clean oil and debris for car wiring before and during soldering. It works great, especially if your solder wire is no good. This product makes wires stick together, avoiding cold joints and other nuances. Plus, a bottle will last a very long time

13.10.2018

A**R

Works perfectly

I dont do alot of soddering. Just the odd repair. This was the best paste I have ever used. Not a single bead dripped from where I placed the weld.

7.03.2020

T**Y

Works well

Good price and product!

18.12.2023

C**.

So glad I purchased it.

Excellent prroduct, much easier to use and clean up than liquid flux. Wanted to try it after seeing high recommendations on stain glass websites.

27.04.2025

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

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Received my product in pristine condition. Great service overall.

1 month ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Very impressed with the quality and fast delivery. Will shop here again.

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